I cannot understand that whenever I type a sentence in chatgpt and to assure that it is grammatically correct It is always wrong, it says " in japanese its not casual to say this or is unnatural in japanese: I used the te form : １０時間でねたかったです。---> Isn't it correct? I wanted to sleep for 10 hours. When do we use de form then? Chatgpt says The correct answer is :「１０時間寝たかったです。」 → "I wanted to sleep for 10 hours." (Most natural), but「１０時間で寝たかったです。」 still sounds unnatural because 寝る (to sleep) is not an action with a clear completion point in the same wayas finishing homework or eating a meal.
- 私はケーキでお菓子を作りました。--> Is it also correct?
translation = I usually go home at 5:00, but 'at' is De. Correct ans = ni
Although I would never trust chatgpt with giving accurate information for language learning, it is correct here.
で is attached to a period of time to mark the completion of the activity. sleeping isn't exactly a thing you can "complete", so you don't need it: just the period of time is enough.
